ABB FENA-01 - Page 170

170 EtherNet/IP – Communication profiles
Vector mode
When the drive is operating in the vector mode, the drive provides
the adapter module with a speed actual. The ODVA AC/DC drive
profile uses rpm units for the speed actual. The ODVA Speed
Actual is calculated as follows:
where
For example, for a Drive Speed Actual of 900 rpm with a unit of
0.5 rpm, the ODVA Speed Actual is:
Dsa = Drive Speed Actual in rpm
Osa = ODVA Speed Actual
Us = ODVA Speed Unit (see 23 ODVA SPEED SCALE on page 125).
Us
Dsa
Osa =
900
rpm0.5
rpm450
Us
Dsa
Osa ===